Cyclic electron flow compensates loss of PGDH3 and concomitant stromal NADH reduction.

ABSTRACT: In nature plants constantly experience changes in light intensities. Low illumination limits photosynthesis and growth. However, also high light intensities are a threat to plants as the photosynthetic machinery gets damaged when the incoming energy surpasses the capacity of photochemistry. One limitation of photochemistry is the constant resupply of stromal electron (e^-) acceptors, mainly NADP. NADP is reduced at the acceptor-side of photosystem I. The resulting NADPH is utilized by the Calvin-Benson-Bassham cycle (CBBC) and the malate valve to ensure sufficient oxidized NADP ready to accept e^- from PSI. Lately, additional pathways, which function as stromal e^- sinks under abiotic stress conditions, were discovered. One such reaction in Arabidopsis thalian

SUBMITTER: Kramer M 

PROVIDER: S-EPMC11589868 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature